Supercharger drive



June 3, 1930.

R. V. HUTCHINSON SUPERCHARGER DRIVE Filed Aug. 19, 1927 2 sheets-sheet 1June 3, 1930. R. v. HuTcHlNsoN SUPERCHARGER DRIVE 2 Sheets-Sheet 2 FiledAug. 19, 1927 a; ya

Patented June 3, 1930 :ROLAND v. HUCIIOHINSON, OF ,'LANSING, MIOHiGA,ASSIGNOB To GENERAL MOTORS "RESEAROHOORPORATION,OF nniifiizoimfmcmeen,yA''o'orufomuriorr OF nELA-Wraith*T of su-BERCHARGER mmm Applicationlfiled yAugust 19, 1927. Serial HITO. l2,114,996.

v11n the past sruperohargers have been' ignd theA ap "lication o'fgthegear@ thereto.

-nd-Vlowerbearingzit 44. l To thelOWefend ofthe hollow ,shaiz'trBO'cup-'shiedportion 36, to rwhich 'is 'Secured is provided' a' plziiii"bearing rneinbe'r inthe iform of aa headed'bushing 44 and between OfyFigure 2 taken Ourthe liner 3- 3 of fP "ig- 2. if; I f ,Y Ai. frV*Figures 4 'and 5 are sectional views of modiliedvfrriis ofthe drive'shownin Figure" l. v

' Figure '6 is a sectional View'thrlough the supercharger used inconnectionwith l:the drive in IFigures 1,14 arid"j5,` the ,s etifon'loeing taken through oneof the tubes used for the 'returnofunvolzitilizedfuel. j "Referring tothe "numbered parts von the d*dr'awing,"10 indicates the Orakcase' of an internal combustin' engine,,'12 isiy the erallr shaft," 13 the rhrwsjrherwf 'fand r4 en@ @1fthe'beziring's Whiclisupports the shzft' ',Tli'e 6 5 bearing 14, @serledige@ fion-1; Figures f2 "h and' '3, is` cohipjolsedoftwosrzllerfjbeztring sections leapd 1 8, ported-by thelrakcage by meansoftheribs 120 ttnd22; j Bushings/wendt21:, halviugflnged po'rtions'23and 25 are provided between` the"crankhft m' 12 andthe'frilos''20v andV22. '7

i Between thef'anges23 and `25 and the b eriii@ halves '16"and. 18, thecrankshaft-,12 has: age 24,1130? which is secured the "gear '26,'w'hich`drives thef,`gfea;r A28, integml"with g a Vertical hollow shaft 30,extending below 'kthe'crlsefas vshown ayt" 3 2 infFigure Y1.

fcrnkcase :ind "hifs. fan" 'uppeu bearing atx "33 thereis'securjediniany sutahleway a; collar :34, thelowerfend of whichterminates" in a ar'ingiaving an inner conioaljsurface as shown at 40,anld which forms One-half 'ofabl'utch' :member indicated as a whole yat42;' At'the lower end Yof? the orankcase'there the bushing 44 sind .thecollar 34h', ball bearing 46 is providedto take: up they thrust and toallowjfor the vfree rotation of the parts. v v. I95 vrithin the holloweheft() there is pOs- 'i timed; a SeCQed Shaft; 48,.. thelower; end ofwhich has` splined V*thereon* the hollow i O one 50,; A which isfconstantly urged downwardly conditions.

which abuts against a ball bearing 87 positioned' against a headedcollar v54, screwthreaded onto the lower Vend Vof the horllow shaftl 30.The opposite end of the spring rests in the cup of the cone 50.y

ktendency to damage or break a positive sur lr percharger drivemechanisinbut by the provision of thelslipping clutch" any excessiveove-rloadsl will .be taken up in the Vclutch miembe-rrper* Se dit* tothe Slip between in@ surfacesy of the cones. In actual practicethe'mechanism is designed to slip atffour times normal torque of maximumspeed and load,.but .this may' vary. according to the Referring to thestructure ofFigurey 4 the gear 26'is similar. Yin' all respectsito thegear shown in Fig'u'rel'l. Mesliingl with the gear 26 is al gear 56,having bearings 58 and 60 at itslower vand upper portionsrespectively.y'Applied to the upper end of the'gearl isk a4 spring-,pressed Iconeclutch 42 the const-ructionand operation ofV which areV essentially thesame as the clutch42 of v.Figure l.. ball bearing 62 lis v.providedbetween thebearing 60 anda collar 64 onthejshaft 30 to take upthrust.VOnrthe other sidev of thel clutch is a shaft .48 which drives thesupercharger.'Y v n p y, .A In the structure of Figure 5 lthe gear 26 yis similarl to-that of Figure 1. Driven by is in all respectssimilar..vf

the gear V26 is agear 28 integralwithaj.

hollow shaft 30 which extends slightly below `the crankcase 10.` Thelower portion Vof-thefshaft 30 is set in ,a v`bearing 66 and betweenthis bearing and thespringpopenV lated yclutch 42v there is 1positioneda ball thrust bearing 68Mto take up thrust from ythe shaft 30".VVithinthe hollow .shaftV 30y there is positioneda second shaftg48 lwhich extends upwardly over the Y engine block to drive thesupercharger. ,The-clutch member42 is substantially the same 4as thatshown in FiguresV l and 4 and its operation The shafts 48,48 011748 aresecured to the (rotor 72 as shown aty 49 in Figure 6.

The shafthas a flange 88 towhich the rotor` VvZ2-is secured. The (shaftend is hollow. Vto

receive alV pin94 integral with the rotor.'y A

' bal'l bearing 89 surrounds'the shaft andis .spaced from the ifflange88 by a collar 90.

The bearing 89 is positioned in an extension '9lfof` the lowerportionf'96 of thesuper-V charger' housing 95 and is held inplaceby Y anut 92 andthe cover 'member 93.

If desired Vthe vgears 28 or 28"( and their associated shaftingmaybefremovedifrom below by removing the bushing 44 or bearing 66.

The supercharger of the present inven-V tion isv shown as a whole atinFigure 6 and is preferably though` not necessarily placed above theengine. vrThe supercharger is generally ofthe conventional'7 centrifugaltype and has the blades 74 and the usual ture of the superchargen isthev provision p of'a plurality of tubes 76which-ext'end to rotor `7.2 Ydriven `by shafts.. 48; l 48; Or 48..1 Y

the inlety `82 from a gutter or trough 7 8 provided within thevcompression'chamber 80 of theY supercharger; VjOnlfyfone offthese tubesisshown but'as many a'svdesiredf-may Y be provided. "Whenthe rotorf72is.in operation the pressure Ydifference between the compression chamber8O'andV the inlet 82 'will Vi f Vcause a flow through ,the tube76'5of3any `j unvolatilized fuel which `has ireached4 the compressionchamber`80 andfallen' into theY trough 7 8. "By returning theunvolatilized fuel to thema sarthe fspeedwithwhich'it n v -90A is driventhrough the rotor will tend to brea'lr it up into the atomized state." V.Y 'TheY entrance from thef carburetor shown at 84 and shown at 86. l nig, ,Y While the superchargerv shown in Figure the v outlet to Y thel'engine 'in'connection with the drives shownon the drawing. Thedisclosure ofthe presentin; vention is particularly adapted [toy'super-Achargers ofthe wtype lshown wheniplafced horizontally above an L-head`engine I claimt` 'Y bustion engine having a crankk shaft'phaving f 1.Inv combination an iginternalcom# fgs- 6 is to be preferred itisfobviousthat, any *suitable-type of supercharger may be used end andintermediate'bearings, `one of said lntermedlate'bearings formed of two,bear@V `ling portions, a worm wheelrigid with saidshaftbetweenfsaidbearing portions, aworm Y meshing with( said'wheel'," ahollowlfshaft rigidwith said worm, 'a -shaftinsaid hollow vshaft anddriven, thereby, Yand a super- 2. In combination with p an 1 internalcom-V bustion engine 'having a crankshaft having chargerdrivenfrom'saidlast named shaft. i' i end and intermediatebearings, one ofsaidintermediate" bearings'k formedf of two bearingpportions, ak worm wheelrigid .withisaid shaft between said bearing portions,v aworm f meshingwith said wheel, ya hollow shaft rigidwith said worm, ashaft in, saidhollowA shaft' and driven thereby,1a -drivecon-y ,y Y. A`neotion betweensaidshaft permitting slipping at overloa'ds,`and a superchargerdriv .p

A 3. In combination withv ank internal com- '1^ en from said'last nainedshaft. Y

bustion engine yhaving' acranl shafthaving end and intermediatebearings,y one of said intermediate bearingsfOrmed'oftWobearingportionsya worm wheel rigid with said loef l shaftbetween saidl bearing portions, a worm meshing with said wheel, a hollowshaft rigid with said worm, a shaft in said hollow shaft, a springoperated cone clutch forming Y a drive connection between said shafts,and

a supercharger driven from said last named shaft. A1C.v In combinationwith an internal comv Vbnstion enginehaving a crank shaft having ,lo endand intermediate bearings, one of said intermediate bearings formed oftwo bearing portions, a worm wheel rigid with said shaft between saidbearing portions, a worin meshing with said wheed, a hollow verticalshaft rigid with `said worm and having its bearings in the crank ease, ashaft in said hollow shaft, a slipping clutch connecting said shafts,and an overhead superoharger driven from said llast named shaft.

2O In testimony` whereof I aiiiX mv signature.

, ROLAND vHnioi-iNsoN.

